They can't efficiently extend frontline "into the depth" (km) because it leads to "cauldrons", so they extend it along all the border.

My point is that that’s an incredibly poor showing for Russia fighting against a massively outnumbered enemy that’s mismanaging a war fought by people who don’t want to fight.

It took 2 absurd failing counteroffensives to wipe all willing soldiers and forced conscription started just half of year ago, and everything was on rapid decline since then. It doesn't all happen overnight.